LOL. I incurred the eternal emnity of a Magneto fan on CBR (who I understand has since been banned) for advocating the same thing. That and he just in general would trash Doom at any chance he got so that I kept him on ignore.
But you approached it in way that is so much more satisfying and let the other guy come to the realization on his own. I always thought making them both persecuted minorities whose families suffered for it really sort of cements it. I think even Claremont, the main architect who fleshed out Magneto, would admit to using Doom as a template. The only difference is that unless I am wrong, he retconned the friendship with Charles. I recall in the X-Men, the Juggernaut Cain Marko starting out as the one villain having that prior history with Charles by making them step brothers.
The main difference is that Claremont will allow Magneto to be heroic, a guy with good intentions who sometimes goes about things the wrong way. He even retconned the Xorn situation to clear Magneto from any blame. As for myself, I'd rather think that Doom is redeemable (as Gerry Conway believed for example) but he just won't get there anytime soon. And I think most of us fans like it that way
Congrats on getting the Ellis Doom 2099 TPB. It has a lot of great bonus features like Doom's manifesto. If you can find any of the back issues by John Francis Moore, who was the first writer on the series, they are well worth reading also. Doom 2099 was far more Doom-like, or as Doom
should be IMO, then what DeFalco was doing in the Fantastic Four at that time.